On Thu, Jan 28, 2021 at 04:56:26PM -0800, Marc MERLIN wrote:
> On Wed, Jan 27, 2021 at 03:33:00PM -0600, Bjorn Helgaas wrote:
> > Hi Marc, I appreciate your persistence on this. I am frankly
> > surprised that you've put up with this so long.
>
> Well, been using linux for 27 years, but also it's not like I have much
> of a choice outside of switching to windows, as tempting as it's getting
> sometimes ;)
>
> > > after boot, when it gets the right trigger (not sure which ones), it
> > > loops on this evern 2 seconds, mostly forever.
> > >
> > > I'm not sure if it's nouveau's fault or the kernel's PCI PME's fault, or
> > > something else.
> >
> > IIUC there are basically two problems:
> >
> > 1) A 2 minute delay during boot
> > Another random thought: is there any chance the boot delay could be
> > related to crypto waiting for entropy?
>
> So, the 2mn hang went away after I added the nouveau firwmare in initrd.
> The only problem is that the nouveau driver does not give a very good
> clue as to what's going on and what to do.
>
> For comparison the intel iwlwifi driver is very clear about firmware
> it's trying to load, if it can't and what exact firmware you need to
> find on the internet (filename)
I guess you're referring to this in iwl_request_firmware()?
IWL_ERR(drv, "check
git://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git\n");
How can we fix this in nouveau so we don't have the debug this again?
I don't really know how firmware loading works, but "git grep -A5
request_firmware drivers/gpu/drm/nouveau/" shows that we generally
print something when request_firmware() fails.
But I didn't notice those messages in your logs, so I'm probably
barking up the wrong tree.
> > 2) Some sort of event every 2 seconds that kills your battery life
> > Your machine doesn't sound unusual, and I haven't seen a flood of
> > similar reports, so maybe there's something unusual about your config.
> > But I really don't have any guesses for either one.
>
> Honestly, there are not too many thinpad P73 running linux out there. I
> wouldn't be surprised if it's only a handful or two.
>
> > It sounds like v5.5 worked fine and you first noticed the slow boot
> > problem in v5.8. We *could* try to bisect it, but I know that's a lot
> > of work on your part.
>
> I've done that in the past, to be honest now that it works after I added
> the firmware that nouveau started needing, and didn't need before, the
> hang at boot is gone for sure.
> The PCI PM wakeup issues on batteries happen sometimes still, but they
> are much more rare now.
So maybe the wakeups are related to having vs not having the nouveau
firmware? I'm still curious about that, and it smells like a bug to
me, but probably something to do with nouveau where I have no hope of
debugging it.
> > Grasping for any ideas for the boot delay; could you boot with
> > "initcall_debug" and collect your "lsmod" output? I notice async_tx
> > in some of your logs, but I have no idea what it is. It's from
> > crypto, so possibly somewhat unusual?
>
> Is this still neeeded? I think of nouveau does a better job of helping
> the user correct the issue if firmware is missing (I think intel even
> gives a URL in printk), that would probably be what's needed for the
> most part.
Nope, don't bother with this, thanks.
Bjorn
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